Results 101 to 110 of about 90,372 (304)

SMALL SATELLITE ATTITUDE DETERMINATION METHODS WITH VECTOR OBSERVATIONS

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2014
Scientific research about the methods of determining the orientation of the satellite are increasing with the developments in space technology combined with an increase in the use of small satellites in space missions.
Demet Çilden, Cengiz Hacızade
doaj  

On the exterior magnetic field and silent sources in magnetoencephalography

open access: yesAbstract and Applied Analysis, 2004
Two main results are included in this paper. The first one deals with the leading asymptotic term of the magnetic field outside any conductive medium.
George Dassios, Fotini Kariotou
doaj   +1 more source

A Distributed Wireless Camera System for the Management of Parking Spaces

open access: yesSensors, 2017
The importance of detection of parking space availability is still growing, particularly in major cities. This paper deals with the design of a distributed wireless camera system for the management of parking spaces, which can determine occupancy of the ...
Stanislav Vítek, Petr Melničuk
doaj   +1 more source

Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides

open access: yesAdvanced Functional Materials, EarlyView.
A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri   +11 more
wiley   +1 more source

A Space-Vector-Based Hysteresis Current Controller for a General n-Level Inverter-Fed Drive With Nearly Constant Switching Frequency Control

open access: yes, 2013
A current-error space-vector-based hysteresis current controller for a general n-level voltage-source inverter (VSI)-fed three-phase induction motor (IM) drive is proposed here, with control of the switching frequency variation for the full linear ...
Mathew, K   +4 more
core   +1 more source

An application of vector based swarm optimization for designing MPPT controller of a stand-alone PV System

open access: yesIranian Journal of Electrical and Electronic Engineering, 2014
In this paper, the Vector Based Swarm Optimization method is used for designing an optimal controller for the maximum power point tracker of a stand-alone PV System. The proposed algorithm is executed on vectors in a multi-dimension vector space.
A. Gharaveisi, G. A. Heydari, Z. Yousofi
doaj  

Chiral Phase Change Nanomaterials

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow   +11 more
wiley   +1 more source

Drawing Single NMR Spins and Understanding Relaxation

open access: yesNatural Product Communications, 2019
How should we draw vectors to represent individual nuclear spins? Vectors in 3D space are merely a way of understanding the mathematics of quantum mechanics, which provides the “true” description of a single spin-½ nucleus.
Mike P. Williamson
doaj   +1 more source

Blood Biomarkers and Surface‐Enhanced Raman Spectroscopy for Gout: A Comprehensive Review

open access: yesAdvanced Functional Materials, EarlyView.
Schematic illustrating gout disease progression from asymptomatic hyperuricemia to chronic tophaceous disease, highlighting the limitations of conventional imaging and biochemical diagnostics and the potential of engineered SERS platforms for ultrasensitive blood‐based detection of urate‐related biomarkers across disease stages, with the color gradient
Isuri Perera   +6 more
wiley   +1 more source

Quaternion-based disorientation coloring of orientation maps

open access: yes, 2017
The authors of the present work propose a color coding technique using quaternions for the display of crystallographic orientation data such as EBSD maps.
Klaus Mehnert   +7 more
core   +1 more source

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